The '''Substance Abuse and Mental Health Services Administration''' ('''SAMHSA''') is a branch of the U.S. Department of Health and Human Services
. It is charged with improving the quality and availability of treatment and rehabilitative services in order to reduce illness, death, disability, and the cost to society resulting from substance abuse
and mental illness
es. The Administrator of SAMHSA reports directly to the United States Secretary of Health and Human Services|Secretary of the U.S. Department of Health and Human Services
. SAMHSA's headquarters building is located in Rockville, Maryland.